/* Copyright (c) 2008, The Visigoth Software Society
 * Copyright (c) 2006, Sun Microsystems Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright notices,
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name Visigoth Software Society, FreeCC, Sun Microsystems, Inc. 
 *       nor the names of any contributors may be used to endorse or promote 
 *       products derived from this software without specific prior written 
 *       permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.visigoths.freecc.parsegen;

import org.visigoths.freecc.Grammar;
import org.visigoths.freecc.parsegen.Expansion;

import org.visigoths.freecc.parser.Token;


/**
 * Describes one-or-more expansions (e.g., foo+).
 */

public class OneOrMore extends Expansion {

  /**
   * The expansion which is repeated one or more times.
   */
  public Expansion expansion;
  
  private String label;

    public OneOrMore(Grammar grammar) {
      super(grammar);
      
    }

    public OneOrMore(Token t, Expansion e) {
        super(t.grammar);
        this.beginLine = t.beginLine;
        this.beginColumn = t.beginColumn;
        this.expansion = e;
        expansion.parent = this;
    }

    private Lookahead lookahead; 
    
    public Lookahead getLookahead() {
        if (lookahead == null) {
            if (expansion instanceof Sequence) {
                lookahead = expansion.getLookahead();
            } else {
                lookahead = new Lookahead(expansion);
            }
        }
        return lookahead;
    }
    
    public String getLabel() {
        return label;
    }
    
    void setLabel(String label) {
        this.label = label;
    }
    
    public Expansion getNestedExpansion() {
        return this.expansion;
    }
    
}
